As roots grow in containers they eventually reach the container 
walls. In hard sided containers, these roots, upon reaching walls, start
 circling to seek a friendlier environment. These root systems exhibit a
 few strong roots growing in circles with very litlle branching. They 
are often bound upon themselves and can produce a strongtap root groeing
 through the containers bottom. These characteristics can hinder the 
plants rate of growth and in some cases its chances of survival when 
transplanted.
In Smart Pot the bags fabric prevents the roots continued 
longitudinal growth, in effect pruning it, causing the root to develop 
masses of lateral fibrous roots. Root systems that develop in a smart 
pot have a much greater mass or volume than those found in hard-sided 
containers and have root balls that contain many more roots then found 
in a hard-sided container of similar size.
The fibrous root systems produced in Smart Pots are more efficient 
and enable plants to maximize water and nutrient uptake in the limited 
surrounding soil mass.